* lto-streamer-in.c (unpack_value_fields): Remove unneeded asserts.
	(lto_input_tree_pointers): Likewise.
	* lto-streamer-out.c (pack_value_fields): Likewise.
	(lto_output_tree_pointers): Likewise.
	* lto-streamer.h (lto_is_streamable): Add check for OMP_CLAUSE
	and OPTIMIZATION_NODE.

From-SVN: r174625